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The Collaborative International Dictionary

Guaiacum \Gua"ia*cum\, n. [NL., fr. Sp. guayaco, from native name in Haiti.]

  1. (Bot.) A genus of small, crooked trees, growing in tropical America.

  2. The heart wood or the resin of the Guaiacum officinale or lignum-vit[ae], a large tree of the West Indies and Central America. It is much used in medicine. [Written also guaiac.]


n. (context medicine English) A paper treated with alpha-guaiaconic acid, used in tests to detect blood in the faeces.


n. hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum [syn: lignum vitae, guaiacum]

Guaiac (disambiguation)

Guaiac can refer to:

  • Guaiacum, a genus of shrubs and trees native to the Americas
  • Oil of guaiac, a fragrance used in soap
  • Guaiacol, a natural organic compound derived from Guaiacum
  • Stool guaiac test, a test for the presence for occult blood

Usage examples of "guaiac".

At the time, guaiac, a bush that grows in the West Indies, was commonly used to treat syphilis.

The physicians put their patients in closed rooms in which the guaiac was burned.

Realizing how profitable the importation of guaiac could be, the Fuggers obtained a monopoly.

Damnedest thing--bearings and shafts were repaired with parts made of this guaiac wood.